In the given circuit, the input voltages at $\mathrm{P}$ and $\mathrm{Q}$ could be either $0 \mathrm{V}$ or $10 \mathrm{V}$. Use the fact that a diode under forward bias is a short circuit, and under reverse bias is an open circuit. The truth table of the circuit will be that of

Given, $A$ and $B$ are input terminals

Logic $1$ is$>5 \mathrm{V}$

Logic $0$ is$<1 \mathrm{V}$

Which logic gate operation, the following circuit does?

Note: This question was awarded a bonus. $C$ option changed. 

Boolean relation at the output stage- $Y$ for the following circuit is:

In the following circuit, what are $P$ and $Q?$

The logic gate equivalent to the given logic circuit is:

Which logic gate is represented by the following combination of logic gates?

Identify the operation performed by the circuit given below :

In the following digital circuit, what will be the output at $\mathrm{Z}$, when the input $\left(\mathrm{A},\mathrm{B}\right)$ are  $\left(1,0\right), \left(0,0\right), \left(1,1\right), \left(0,1\right)$

Identify the gate and match $A,B,Y$ in the bracket to check.